Yes. Investments everywhere, AI being applied in drug discovery and biological research, attention from big companies leading to investment feedbacks.

It will come naturally as computing and AI itself enhances and speed up medical research.

It's not a explosion but a snowball

Makes sense. Considering in the end what matters is positive legacy or investments he did done in the right direction. Investing in space, AI, brain chips and renewable is already enough for one person.

If everyone could have similar impact then we be talking exponential chances across the globe. That's only possible currently with wealth. Because most things are expensive.

We must develop tools so they're no longer that expensive. And everyone can deploy gigaawatts of energy or make skyscrapers, crowdfund O'Neill cylinders or set up shop at Pluto.

Musk wouldn't be able to do what he does if not for modern technologies and infrastructure. in medieval times he'd be at best a patron of knowledge. So wealth alone isn't the key. It's the compounded exponentials.

All his unhinged pandering to political extremism and irrelevant ideologies (such America's culture wars) show a facet of weakness in present society; most people aren't ready for full technocracy. They still yearn for petty conflicts, identity based rivalry and old styled political mindset.

Technocracy is by far the best option for mankind. And the toughest one since it requires systemic change in how politics is viewed; not anymore as identity or as popularity contest.

Same could be said when Europe and Asia were in their 'high population growth phases'.

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So much, Europe came with several theories and ideologies associating populational growth with poverty, due to misunderstanding of the rapid effects of advancing technologies in birthrates and goods availability overall.

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Most of South Asia (India, Pakistan, Bangladesh) for example, albeit relatively poor (but not as poor as 30 years ago) is already seeing their fertility rates falling quickly, and economical development taking pace as wealth generation surpasses population increases.

Africa will take more time given higher rates, but will follow suit.Most modern cities barely existed as they are a mere 50 years ago.

China being the most staggering example, but with examples all across (mostly) East Asia and the Persian Gulf.

Even already stablished western nations saw that, depending on their urbanization model (less in USA where car centrism/suburbia is rampant, less in Europe where historical aesthetics is coded on law but more on Canadian and Australian cities)

Indeed. underpopulation, at least if we define it as the lack of young people, is already being felt in many countries. Others are stemming the process through immigration.

But the practical end of mortality will make population jump to at the very least 13~15 billion, considering the original 9-11 billion projections by 2100, minus all these deaths. Maybe more if economic paradigms shift, etc. So we might be talking about 20 billion by 2100. There'll be nice cities all around the world at these numbers and available technologies...